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Only for training and service purposes
3. TECHNICAL BRIEF
3. TECHNICAL BRIEF
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Digital-to-analog converters
The multi-bit oversampling DACs of the X-GOLD™215 audio front-end convert the 16-bit data words coming
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Output Amplifier
The different output buffers in X-GOLD™215 are driven by the outputs of the selection block. The differential
from the digital interpolation filters to analogue signals.
earpiece driver can be used to drive a 16 Ω earpiece and works in differential. The two single ended headset
drivers can be used to drive a 16 Ω headset. They can work unipolar mode, where an AC coupling of the headset
might be needed, or can work also in bipolor mode. The differential loudspeaker driver can be used to drive a 8 Ω
loudspeaker. As it is a class-D amplifier the needed suppression of the higher harmonics of the switching signals
has to be achieved by the external circuitry. The buffers are designed to be short circuit protected.
Figure 3.12.3 Switching for R/L DACs onto Buffers
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Figure 3.12.3 Switching for R/L DACs onto Buffers